SLIMbus - SLIMbus DATA and CLK

SLIMbus DATA and CLK

All SLIMbus Devices use DATA and CLK to synchronize with the bus configuration in use, to receive or transmit messages and data, and to implement bus arbitration, collision detection, and contention resolution between devices.

For all SLIMbus Components (except one containing a Framer Device), the CLK terminal is input only. If a SLIMbus Component is the Framer Device, or contains a Framer Device, the CLK signal is bi-directional.

For all SLIMbus Components, the DATA line is bidirectional, and carries all information sent or received on the bus using Non-Return-to-Zero Inverted (NRZI) encoding.

The DATA line is driven on the positive edge and read on the negative edge of the CLK line. The DATA line can be driven high, driven low, or held at the high or low level by an internal bus-holder circuit, depending upon the particular operational mode of a SLIMbus Device.

The SLIMbus interface DATA and CLK lines use CMOS-like single-ended, ground referenced, rail-to-rail, voltage mode signals, and signaling voltages are specified with respect to the interface supply voltage (+1.8Vdd or +1.2Vdd are permitted). For EMI performance reasons, slew rate limits have been specified for SLIMbus.